(Ruby) Cloudfare DNS over HTTPS

Cloudflare offers a DNS over HTTPS resolver at: https://cloudflare-dns.com/dns-query

This example demonstrates how to do a DNS lookup for a domain using Cloudfare's HTTPS resolver.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

http = Chilkat::CkHttp.new()

# Send the following CURL request:   curl -H 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=chilkat.io&type=A'

http.put_Accept("application/dns-json")

url = "https://cloudflare-dns.com/dns-query?name=chilkat.io&type=A"

jsonResp = http.quickGetStr(url)
if (http.get_LastMethodSuccess() != true)
    print http.lastErrorText() + "\n";
    exit
end

print "Response Status Code: " + http.get_LastStatus().to_s() + "\n";

json = Chilkat::CkJsonObject.new()
json.Load(jsonResp)
json.put_EmitCompact(false)
print json.emit() + "\n";

if (http.get_LastStatus() != 200)
    print "Failed." + "\n";
    exit
end

# Sample output...
# (See the parsing code below..)
# 

# {
#   "Status": 0,
#   "TC": false,
#   "RD": true,
#   "RA": true,
#   "AD": false,
#   "CD": false,
#   "Question": [
#     {
#       "name": "chilkat.io.",
#       "type": 1
#     }
#   ],
#   "Answer": [
#     {
#       "name": "chilkat.io.",
#       "type": 1,
#       "TTL": 900,
#       "data": "52.25.83.238"
#     }
#   ]
# }

# Use this online tool to generate parsing code from sample JSON: 
# Generate Parsing Code from JSON

Status = json.IntOf("Status")
TC = json.BoolOf("TC")
RD = json.BoolOf("RD")
RA = json.BoolOf("RA")
AD = json.BoolOf("AD")
CD = json.BoolOf("CD")
i = 0
count_i = json.SizeOfArray("Question")
while i < count_i
    json.put_I(i)
    name = json.stringOf("Question[i].name")
    type = json.IntOf("Question[i].type")
    i = i + 1
end
i = 0
count_i = json.SizeOfArray("Answer")
# The domain name resolves to 1 or more IP addresses..
while i < count_i
    json.put_I(i)
    name = json.stringOf("Answer[i].name")
    type = json.IntOf("Answer[i].type")
    TTL = json.IntOf("Answer[i].TTL")
    ipAddr = json.stringOf("Answer[i].data")

    print "IP Address: " + ipAddr + "\n";
    i = i + 1
end